-1- Micro lecture
Terms
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- Prions
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Cause "slow infections" (months - decades - years) before symptoms.
Amyloid plaque found in CNS. - Scrapie
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Prion
Fatal brain disease in sheep.
Dementia - spasms - coma - death - Creutzfeldt-Jakob Disease
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Prion
Worldwide
Humans aged 50 to 70 years old. - Kuru
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Prion
Fore tribe in New Guinea
Trembling - shivering - coma death - Viroids
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"Virus like"
Linear and Circular RNA.
10x smaller than smallest plant virus (Lack a protein coat)
Cause a number of plant diseases.
Infect: Chrysanthemums, potatoes, cucumbers, citrus trees, coconuts. - Viruses
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RNA or DNA (Single or double stranded)
infect many life forms. - Rickettsias and Chlamydias
- Reproduce only within a host cell
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Rickettsias and Chlamydias
Bacteria and Archea - Lack a true nucleus or membrane bound organelles. (4)
- Bacteria and Archaea
- Range from Antartic Ice to Steaming geysers
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Bacteria and Archaea
Fungi - Live on dead and decaying organic matter
- Algae
- Unicellular photosynthetic organisms
- Fungi
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Yeast, Molds, and mushrooms
Nonphotosynthetic
Most are saprophytic - Protozoa
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Unicellular Animals
Eukaryotic
Most are free-living
Some are symbiotic (Living in close relationship with another organism)
Some are parasites. - Helminths
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Roundworms and flatworms
Free-living and parasitic - Diphyllobothrium latum
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Eg. of Helminths
Fish tapeworm
Can be up to 30 feet in length. - Microbiology
- The study of organisms too small to be seen clearly with the unaided human eye.